George weinman



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duftet tapes @sind (attira GEORGE WEINMAVN, OF COLUMBIA, OHIO.

Letters Patent No. 104,909, (lated June 2S, 1870.

The Schedule referredto in these Letters Patent and making-part of the same To all whom it may concern on, making a part ot this s pecilication.

The'nature of my invention consists in the coustruction of a valve surrounding the pistou-head of a l steam-cylinder.

In order toA enable others skilled in the art to which my invention appertains to made and use the same, I will now proceed to describevits construction and operation, referring to the annexed drawing, iu

Figure l is a side elevation of a steam-cylinder,

Figure's a horizontal section of the same, showing the piston and valve surrounding the same.

For better reference and easier understanding of my invention, I have, in this view, representedthe Sgam-inlet and outlet as being directly opposite each o 1er.

Figure 3 is a transverse vertical section taken through the center of tig. l.

A represents a horizontal steam cylinder con-v structed in any of the known andusual ways. l

,On top of the cylinder A is the steam-inlet B, and on the side is the outlet or exhaust C.

v In g. 2 of thedrawing I have represented the exhaust G as being directly opposite the inlet B, this beingonly done for easier reference, gs. 1 'and 3 of the drawingl showing that the proper place for said exhaust is on the side ofthe cylinder.

D is'the piston, in the center of which the rod E is firmly secured, said rod passing through one head of the cylinder A.

The piston D is provided with two passages a a',

leading one from each end to near the center of'the piston as shown in iig. 2.

At each end of the piston D is a circumferential projecting flange, l), which lits close to the inner surface of the cylinder, or rather the portions marked b are the heads of the piston, leaving the body`of the pistou of smaller diameter, which smaller body is surrounded by a cylinder, G, not quite as long as the body ot' the piston between the anges or heads b b saidcylinder, forming thevalve for the piston.

The valve G can move from end to end on the piston D, but is prevented from turning on thesame by means of a screw, d, passing through the side o't' the valveinto a groove in the body of the piston; and the piston and Ivvalve together are prevented from turning in the cylinder by means of a screw, e, which passes through the side of the cylinder into a longitudinal groove on the outside of the valve, thus allowing the piston to move from end to end within the cylinder.

In the outside of the valve G, directly underneath and against the inlet'B, is a longitudinal groove, f,

extending to near the ends of the valve, and in the center of this groove is an opening, g, corresponding in size with the inner ends of the vsteam-ports a a in the piston.

On each side, a suitable distance from the passage g, 'in the'iuside surface of the valve G, is a circumferential groove, h, forming the exhaust-ports, which open into a longitudinal groove,-lt, in the outside of the valve, directly opposite and against the exhaust C of the cylinder.

i. t are the exhaust-holes from the exhaust-ports h h, which holes correspond in size with the exhaust C of the cylinder. I m nt are the valve-exhausts.

The valve, as shown in fig.y 2, has just moved, and will throw the piston in the opposite direction. The valve-exhaust m has just exhausted. .When the piston reaches the other' end of the cylinder, fm will ex.- haust the valve.

The steamv enters through the pipe B, passing through the port a, pressing against the cylinderhead, which propels the piston inv the opposite direction. As the piston-head approaches the other end of the cylinder, the steam-pipe B extends over the end of the valve, or rather a passageor groove in the inside of the cylinder from the steam-pipe extends over the end of the valve, which allows the steam to enter behind the valves, moves the valve over the other steam-port a', and reverses the motion of the piston-head. After the valve is moved, the steam is exhausted through the port a and exhaust-port h. The exhaust-holes i t' exhaust through the main exhau'st on the side ofthe cylinder'.

The exhaust steam from the valve passes from the exhaustport m (or m) into the groovelc on the valve, and from thence =out with the other exhaust steam through the port C.

Having thus -fully described my invention,

What I claim as new, and desireto secure by Let- The valve G, upon *the 'outside of the piston-head, acting substantially as described, and for thepurposes set forth.

In testimony 'that I claim the foregoing, l have hereunto set my hand this 25th day of March, 1870. GEORGE VVEINMAN.

Witnesses:

T. E. Moons, L. G. BYRNE. 

